parkinson



(No Model.)

- 2 Sheets-Sheet 1.

J. PARKINSON, T. M. MARTIN & 0. G. BOWEN.

ELECTRIC ELEVATOR. No. 556,435.

Patented Mar. 17 1896. Fig. I.

WITNESSES lNVENTORS A TTORNEYS ANDREW BYGRAHAMJHOTD LII'NO WASNINGTONDC.

(No Model.)

2 Sheets-Sheet 2. J. PARKINSON, T. M. MARTIN & C. G. BOWEN.

ELEGTRIG ELEVATOR.

No. 556,435. Patented Mar. 1'7, 1896.

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UNITED STATES PATENT OFFICE.

.IOIIN PARKINSON, THOMAS M. MARTIN, AND CALVIN C. BO\VEN, OF LOS ANGELES, CALIFORNIA, ASSIGNORS TO THE PACIFIC ELEVATOR COM- PANY, OF SAME PLACE.

ELECTRIC ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 556,435, dated March 1'7, 1896.

Application filed February 7, 1895. Serial No. 537,658. (No model.)

To aZZ whom it may concern: forming a guide for the pinions, the flanges Be it known that we, JOHN PARKINSON, on the pinions rotating against the flanges 2 THOMAS M. MARTIN, and CALVIN O. BOWEN, on the standards.

of Los Angeles, county of Los Angeles, in the 10 represents worm or cog wheels secured State of California, have invented certain new rigidly to the center of the drive-shafts 5. .55

and useful Improvements in Electric Eleva- 11 represents the motor suspended at or tors, of which the following is a full, clear, near the center of the traveling frame 2 by and exact description, reference being had means of suitable brackets 12.

to the accompanying drawings, which form a 13 represents the motor-shaft, which ex- I part of this specification. tends nearly the length of the traveling frame 60 Our invention relates to certain improve- 3 and at right angles with the drive-shafts 5. ments in elevators, such as shown, described, 14 represents worm-gears on the motor and claimed in the application of John Parshaft on each sideof the motor, said wormkinson, filed October 24, 1894, Serial No. gears meshing with the cog-wheels on the 15 526,868, and our invention consists in certain drive-shafts, thus imparting motion to the 65 features of novelty hereinafter described,and drive shafts in opposite directions, and pointed out in the claims. through the medium of the pinions at and the Figure I represents a transverse section vertical racks causing the frame or elevator taken on line I I, Fig. III, showing the motor tomove either up or down, as directed.

and manner of imparting motion to the driv- 15 represents a two-part casing inclosing 7o ing-shafts. Fig. II is a bottom view. Fig. and protecting the cog-wheels 10 and .worm- III represents a section taken on line III III, gears 14:, said casing serving also to retain Fig. I. Fig. IV represents a front elevation oil for lubricating said gears and cog-wheels. of the operating lever and brake. Fig. V is 16 represents a beveled gear-wheel secured an edge view of the operating-lever. Fig. rigidly near one end of the motor-shaft 13. 7 5 VI is a plan view of the hinged catch for 17 represents a vertical shaft journaled in a holding the hand-operating mechanism out bracket 18, which is secured to the frame 2 at of gear. 19, said shaft being adapted to be moved up Referring to the drawings, 1 represents the or down in its bearing. 20 represents a bevvertical standards,preferably formed of chaneled pinion secured to the lower end of the 80 nel-irons, between which the traveling eleshaft 17. Vhen the shaft 17 is lowered in vator-frame 2 operates, said standards havits bearing the beveled pinion will mesh with ing vertical flanges 2%. the beveled gear 16 on the motor-shaft.

3 represents paired racks on the outer faces The upper end of the shaft 17 is provided 0f the standards, there being preferablyasewith a squared end 21, on which a crank- 85 ries of four racks. irepresents a correspondwrench 22 may be placed, said wrench being ing number of paired pinions,which mesh with inserted through an opening 23 in the fioor 24 said racks, and which are rigidly secured to of the elevator, the purpose of said wrench the ends of .two drive-shafts 5, said driveand shaft being to form a means of propelshafts being journaled at 6 to the traveling ling the elevator by hand a short distance 90 frame 2. The teeth 7 on the vertical racks should occasion ever require the sa1nesuch, and the gear 8 011 the pinions at are preferably for instance, as the electric current being of the stepped pattern, thus insuring a steady shut off when the elevator is between floors. movement of the frame up or down, besides The shaft 17 is limited in its downward other advantages derived from the use of movement by means of a collar 25 thereon, 5 this form of gear. the shaft and pinion being normally held out {i The pinions 4 are provided with flanges 9 of gear by means of a hinged catch 25% being at the outer ends of the gear, said flanges explaced in close contact with the shaft and tending a short distance beyond the face of the collar resting on the same.

the gear and to each side of the racks 3, thus 26 represents the operating-lever pivoted Ioo at 27 to a bracket 28, said bracket being secured to the traveling frame at 29.

30 represents a grooved pulley secured rigidly to one end of the motor-shaft.

81 represents a flexible strap or band havin g one of its ends secured at 32 to the bracket 28, the strap passing nearly around the pulley and resting in the groove of the same and having its opposite end adjustably secured at 33 to the free end of a bar 34, said strap being made adjustable as to length by means of a nut 35 secured on its upper end. The opposite end of the bar 34: is pivoted to the traveling frame at 36.

37 represents a grooved roller journaled 011 a stud 38 on the operating-1ever 26, said roller being located immediately beneath the bar 34:.

39 represents a boss on the under side of the bar 3% in a vertical plane with the lever 26 when it is in its upright position.

As the lever is brought to a vertical position by the operator the roller 37 will roll against the boss 39, raising the bar 34, thus lifting up on the flexible strap 31, thus forming a frictional brake on the pulley 30 and stopping the (310"Ett01,ll3 being understood that when the operating-lever is moved to a vertical position the electric current is shut off.

40 represents a broken connection leading to the rheostat.

41 represents a lever pivoted to the operating-lever at 42, said lever 41 having an cecentric L3 on its lower end, said eccentric when the lever 41 is forced to one side coming in contact with the edge of a quadrant 44, thus enabling the operator to hold the operating-lever at any desired position without causing any undue strain upon the hand and arm.

45 represents cross-bars which have their ends fitted in the channe1-irons of the standards, thus serving to brace the standards.

By the use of our channel-iron construction of the standards We form a combined rack and standard that permits us to dispense with wooden standards, thus avoiding danger from fire as well as other advantages not necessary to. mention.

We claim as our invention- 1. The combination of the four standards each having on their outer sides a pair of racks formed with stepped teeth and flanges on both sides of the paired racks, the traveling frame, the driven shafts journaled to the traveling frame, the paired pinions formed with stepped teeth and with flanges bearing against the flanges of the standards, the wormwheels secured to the driven shafts, the motor, and the motor-shaft having worm-gears and arranged transversely of the driven shaft; substantially as described:

2. The combination of the four channelstandards, each having on their outer sides a pair of racks formed with stepped teeth and flanges on both sides of the paired racks, the cross-bars located between and fitted in the channel-standards, the traveling frame, the driven shafts j ournaled to the traveling frame, the paired pinions formed with stepped teeth and with flanges bearing against the flanges of the channel-standards the worm-wheels secured to the driven shafts, the motor, and the motor-shaft having worm-gears and arranged transversely of the driven shafts; substantially as described.

3. The combinationwith the traveling frame, of the motor, the motor-shaft the bevel gearwheel secured to the motor-shaft, the bracket secured to the traveling frame, the vertical movable shaft having a supporting-collar at its upper end, and a bevel-pinion at its lower end, and the hinged catch; substantially as described.

4:. In an elevator the combination, of a movable frame, a motor-shaft, a grooved pulley on the motor-shaft, an operating-lever pivoted to the movable frame, a roller journaled to the operating-lever, a movable bar having one of its ends pivoted to the movable frame, a boss on said bar, a flexible strap having one of its ends fixed to the movable frame and its opposite end secured to the free end of the movable bar, said strap being adapted to engage the grooved pulley whereby the action of the roller on the movable bar will contract the strap and thus form a brake on the motor-shaft substantially as set forth.

JOHN PARKINSON.

THOMAS M. MARTIN.

CALVIN C. BOYVEN.

\Vitnesses CHARLES UDELL,

A. Bnvson. 

